Attention to good layout practices is always recommended.

• Keep traces short.
• When possible, use a printed-circuit-board (PCB) ground plane with surface-mount components placed as close to the device pins as possible.
• Place a 0.1-μF bypass capacitor closely across the supply pins.

Apply these guidelines throughout the analog circuit to improve performance and provide benefits such as reducing the electromagnetic-interference (EMI) susceptibility.

Instrumentation amplifiers vary in susceptibility to radio-frequency interference (RFI). RFI can generally be identified as a variation in offset voltage or dc signal levels with changes in the interfering RF signal. The INA333-Q1 has been specifically designed to minimize susceptibility to RFI by incorporating passive RC filters with an 8-MHz corner frequency at the V_IN+ and V_IN– inputs. As a result, the INA333-Q1 demonstrates remarkably low sensitivity compared to previous-generation devices. Strong RF fields can continue to cause varying offset levels, however, and can require additional shielding.